Overview of the Spotlight 150 . 27
The Optical System
The microscope has optics for infrared microspectroscopy and visible light. A video camera
enables you to view the sample. The two systems intersect at the aperture. When a sample
on the sample stage is in focus, its conjugate image is focused at the remote aperture.
Spotlight 150
enables you to select between transmittance and reflectance operation. This
section describes what happens within the optical system when the system changes from
visible light to infrared mode in transmittance and reflectance operation.
Dichroic mirrors form part of the optical system. The dichroic mirrors used in the microscope
reflect infrared and transmit visible light.
Visible Light Optics
When you view a sample with the video camera, you are really looking at the conjugate
image of the sample, located at the remote aperture (Figure 7).
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